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Best way to fix or reduce a 7" to a 6" hole in main vent for humidifier install?
I swapped out my Honeywell that the plastic just fell apart with one of the same. Had a hard time finding one online, but ebay came to the rescue. Well they had made a few changes, and the 6" flex line they sent is to small for the 7" hole already there. I looked at a reducer and there is not much room now for collars and adapters. I'm thinking about getting a 10" Sq piece of tin with a 6" hole in it, and RTV and screw that in place. Or do you know of something better to try?